How Much Do Water Treatment Operators Make?
Water Treatment Operators operate the plants and systems that treat drinking water and wastewater. Official pay data from the BLS May 2025 wage survey.
The median water treatment operator salary is $60,020 per year — 18% above the $50,980 median for all U.S. occupations. About 128,490 people work in this trade nationwide.
Pay by percentile
| Percentile | Annual wage | What it means |
|---|---|---|
| 10th | $39,110 | Entry level / lowest-paid areas |
| 25th | $48,040 | Early career |
| 50th — median | $60,020 | The typical worker |
| 75th | $74,780 | Experienced |
| 90th | $91,060 | Top earners / highest-paid areas |
Water Treatment Operator salary by state
Median annual wage by state, highest first. 1 states are not published by BLS for this occupation (small samples).
| # | State | Median wage | vs. national |
|---|---|---|---|
| 1 | California | $81,770 | +36% |
| 2 | Nevada | $81,440 | +36% |
| 3 | Washington | $80,800 | +35% |
| 4 | Connecticut | $78,820 | +31% |
| 5 | New Jersey | $78,760 | +31% |
| 6 | Minnesota | $74,670 | +24% |
| 7 | Colorado | $74,200 | +24% |
| 8 | Oregon | $69,720 | +16% |
| 9 | Massachusetts | $68,550 | +14% |
| 10 | Illinois | $67,810 | +13% |
| 11 | Hawaii | $65,560 | +9% |
| 12 | Delaware | $64,940 | +8% |
| 13 | New York | $63,990 | +7% |
| 14 | Vermont | $63,640 | +6% |
| 15 | Wisconsin | $63,550 | +6% |
| 16 | Pennsylvania | $63,310 | +5% |
| 17 | Wyoming | $63,260 | +5% |
| 18 | New Hampshire | $62,940 | +5% |
| 19 | Maine | $61,870 | +3% |
| 20 | Maryland | $61,870 | +3% |
| 21 | Rhode Island | $61,820 | +3% |
| 22 | Arizona | $61,340 | +2% |
| 23 | Utah | $61,290 | +2% |
| 24 | Nebraska | $61,220 | +2% |
| 25 | Iowa | $60,990 | +2% |
| 26 | North Dakota | $60,470 | +1% |
| 27 | Alaska | $60,160 | +0% |
| 28 | Virginia | $59,420 | -1% |
| 29 | Michigan | $59,270 | -1% |
| 30 | Ohio | $59,170 | -1% |
| 31 | Florida | $59,030 | -2% |
| 32 | Montana | $58,040 | -3% |
| 33 | Indiana | $53,540 | -11% |
| 34 | South Dakota | $53,370 | -11% |
| 35 | Idaho | $52,210 | -13% |
| 36 | South Carolina | $52,090 | -13% |
| 37 | Alabama | $51,870 | -14% |
| 38 | North Carolina | $51,680 | -14% |
| 39 | Tennessee | $50,670 | -16% |
| 40 | Missouri | $49,940 | -17% |
| 41 | Texas | $49,460 | -18% |
| 42 | Georgia | $48,930 | -18% |
| 43 | New Mexico | $48,190 | -20% |
| 44 | West Virginia | $47,560 | -21% |
| 45 | Kansas | $46,780 | -22% |
| 46 | Mississippi | $46,480 | -23% |
| 47 | Louisiana | $46,210 | -23% |
| 48 | Oklahoma | $45,890 | -24% |
| 49 | Kentucky | $45,430 | -24% |
| 50 | Arkansas | $44,320 | -26% |
Lifetime earnings potential
At today's median wage, here is what a career as a water treatment operator adds up to (in constant 2025 dollars, before raises or promotions — a conservative floor, not a projection):
| Career length | At the median ($60,020/yr) | In the top 10% ($91,060/yr) |
|---|---|---|
| 10 years | $600,200 | $910,600 |
| 20 years | $1,200,400 | $1,821,200 |
| 30 years | $1,800,600 | $2,731,800 |
Reaching the top 10% instead of the median is worth $931,200 over a 30-year career — usually the gap between entry-level work and specialization, licenses, or high-paying states. Compare this trade against any other with the trade comparison tool.
Frequently asked questions
- How much do water treatment operators make?
- The median annual wage for water and wastewater treatment plant and system operators is $60,020 (BLS OES, May 2025). The middle 50% earn between $48,040 and $74,780.
- What do the top water treatment operators earn?
- The top 10% of water treatment operators earn $91,060 or more per year, while the bottom 10% earn $39,110 or less.
- Which state pays water treatment operators the most?
- California has the highest published median at $81,770, followed by Nevada ($81,440) and Washington ($80,800).